tree 48e808e6ba2877f13fbd98b600d4fef8801f7b56
parent 14331a84bd1fdadeb5bd1f3d0182d8aee6e0205a
author Yaowu Xu <yaowu@google.com> 1397676169 -0700
committer Yaowu Xu <yaowu@google.com> 1397678413 -0700

Prevent reading of uninitialized value

This commit added a check of reference frame to make sure that pre
buffer pointers are initialized only when necessary and make them
to 0 if ref frame is intra, hence those buffer should never be used.

Change-Id: Ieb474fcd9feb759f02e2f9c282b7348a8fa31117